Seasonal trend of green spider mite, Mononychellus tanajoa population on cassava, Manihot esculenta and its relationship with weather factors at Moor Plantation

Akinlosotu, T. A.

doi:10.1017/s1742758400001983

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…This ability of highly pubescent cultivars to conserve mites during the rainy season might be useful in the classical biological control of M. tanajoa. Mite densities are usually very low during the rainy season (Akinlosotu, 1982;Yaninek et al, 1988), providing little food for phytoseiid predators that have been released for the classical biological control of M. tanajoa in Africa (Yaninek et al, 1988). Therefore, high pubescence intensity may help to conserve prey for these phytoseiids during the rainy season, but the influence of pubescence on phytoseiid efficiency and survival on the cassava plant needs to be investigated.…”

Section: Discussionmentioning

confidence: 99%

Foliar anatomy of ten genotypes of the plant Manihot esculenta (Euphorbiaceae)

Marín

Barón

Montoya-Lerma³

2020

RBT

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Abstract. Introduction: Cassava Manihot esculenta (Crantz) is a perennial shrub native to South America that is an essential source of carbohydrates for more than 600 million people in tropical countries. Objective: The aim of this study was to describe and compare the leaf blade anatomy of ten genotypes of cassava. Methods: The methodology for anatomical descriptions was processed and 30 leaves of each of the varieties were included and sectioned according to paraffin impregnation protocols. Results: The results showed that the leaf blade anatomical structure of all the varieties in general terms show differences. All varieties had monostratified epidermis, leaf mesophyll consisted of a palisade parenchyma in a single layer and multiple layers of spongy parenchyma. Polyphenolic idioblasts were observed immersed in the palisade parenchyma and spongy parenchyma. Between 3-7 xylem ribs with their respective phloem were found in the midrib in almost all varieties. Trichomes were only found in two varieties (NAT31-ECU72) and leaves were all hipostomatic. Conclusions: The results reveal that NAT31 is the material with the most anatomically marked differences (i.e. presence of trichomes, papillary cell, and, on the adaxial face, special provision in the arrangement of stomata and epicuticle wax patterns), characteristics that might be related to pest resistance.

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Section: Discussionmentioning

confidence: 99%

Foliar anatomy of ten genotypes of the plant Manihot esculenta (Euphorbiaceae)

Marín

Barón

Montoya-Lerma³

2020

RBT

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“…The population dynamics of M. tanajoa in Africa are strongly influenced by climatic factors in the absence of well-adapted natural enemies. Populations of the mite are high during the dry season and low during the wet season (Bondar, 1938;Nyiira, 1972;Yaseen, 1977;Samways, 1979;Leuschner, 1980;Akinlosotu, 1982). Samways (1979) found that mite populations increased 65-fold in one month during the dry season and decreased 21-fold in one week during the wet season.…”

Section: Biology and Ecologymentioning

confidence: 99%

Introduction and spread of the cassava green mite,Mononychellus tanajoa(Bondar) (Acari: Tetranychidae), an exotic pest in Africa and the search for appropriate control methods: a review

Yaninek

Herren

1988

Bull. Entomol. Res.

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Mononychellus tanajoa (Bondar), a spider mite new to Africa, was discovered on cassava in Uganda in 1971. This exotic mite of Neotropical origin has since spread to 27 countries, causing an estimated 13-80% reduction in cassava yield. The history of its introduction and spread in Africa is reported, and present knowledge on the taxonomy, biology, ecology and pest status of the mite, and the evolution of strategies to control it are reviewed. While attempts have been made to control M. tanajoa, it remains a serious pest in most areas. The prospects for classical biological control as an appropriate control strategy are discussed.

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